1: place the units in the ratios (make sure they match, you should label the numbers in your work so you know put the units in right unlike what i did in my work) and cross multiply
2: divide both sides by 924 in. to get x by itself
Your answer would be the first on because when you set up your equation you can find 4 by dividing 42,980 by 10 4 times wich will give you 10^4 when you divide exponents you subtract so iwill look like this....
